St. John's Wort Contains Hypericin That Inhibits Monoamine
Oxidase, A Bodily Chemical Associated Wit
At least one out of every 20 Americans gets depressed each year,
and many rely on anti-depressants to help them cope. A new study
shows the herb St. Johns
Wort might be just as effective, and with fewer side effects.
About St.
Johns Wort:
The August 3, 1996 issue of the British Medical Journal contains
an analysis of approximately 25 studies that suggest that St. Johns
Wort (Hypericum perforatum) is just as helpful as commonly
used drugs, without side effects such as headaches or vomiting.
Dr. Cynthia Mulrow, one of the studys authors, says the findings
are not surprising. "Some of the commonly used medicines have a
basis on herbs or have a basis in plants, and some of the ones
were developed using plants.
Clinical Studies:
Not long ago, experiments were done where mice infected with
viruses similar to HIV were given St. Johns
Wort extract. The virus progress was halted. This led to
testing on human HIV and AIDS patients. The results are
inconclusive, though anecdotal information reports a significant
improvement in some patients. St. Johns
Wort contains hypericin that inhibits monoamine oxidase, a
bodily chemical associated with depression. It appears that
hypericin does not act alone. Like many herbal medicines, St. Johns
Wort relies on the complex interplay of many constituents
for its antidepressant actions. Patients suffering from
depression received relief, increased appetite, more interest in
life, greater self-esteem and restoration of normal sleeping
patterns. St.
Johns Wort is available as tea, tincture, decoction, oil,
and in capsule form. Teas should be made with 1-2 cups of
flowers per 1 cup of boiling water. This tea can be drunk three
times daily. The dosage of the tincture is 1/4 to 1 teaspoon up
to three times daily.
Perhaps most notable regarding St. Johns
Wort extract for depression has been favorable comparisons
to standard prescription antidepressive drugs. These include
maprotiline hydrochloride and imipramine.
In a multicenter trial, 135 patients with depression were given
either St.
Johns Wort (900 mg/day) or imipramine (75 mg/day) for six
weeks. Therapeutic success was determined using the HAMD,
Clinical Global Impression (CGI), and Depression Scale according
to Zerssen. HAMD score improved by 56% in the St. Johns
Wort group versus 45% for the imipramine group. Differences
on the CGI and Zerssen scales were slightly better for St. Johns
Wort although not significantly different. Adverse reactions
were reported in 16% of patients taking imipramine while only
12% of those taking St. Johns
Wort experienced side effects.
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